名詞 clockwork:

1. any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock

1. The landlady was sent out for a two-hour walk with the dog, no matter what the weather; whereupon the niece and the respectable looking middle-aged man promptly went upstairs. He was as regular as clockwork.
   無論天氣如何，房東太太要帶狗出去散步兩個小時，這時那侄女便和一個看上去很體面的中年男人上了樓。那人每天也真夠準時的。
2. She arrives every day at five, (as) regular as clockwork.
   她每天五點鐘到，極有規(guī)律。
3. The milkman calls at seven-thirty every morning, regular as clockwork.
   送奶人極有規(guī)律地在早晨7：30送來牛奶。

clock.work

n.（名詞）
A mechanism of geared wheels driven by a wound spring, as in a mechanical clock.
鐘表機械，發(fā)條裝置：一種由齒輪組成的機械裝置，由彈簧驅動，如機械表內(nèi)部的裝置

<習慣用語>like clockwork
With machinelike regularity and precision; perfectly:
精確地，有規(guī)律地：類似機器的規(guī)律和準確地；精確地：
例句：
The project proceeded like clockwork.
計劃準確地進行著